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std.experimental.allocator.showcase

Collection of typical and useful prebuilt allocators using the given
components. User code would typically import this module and use its
facilities, or import individual heap building blocks and assemble them.

template StackFront(size_t stackSize, Allocator = GCAllocator)

Allocator that uses stack allocation for up to stackSize bytes and
then falls back to Allocator. Defined as:

Choosing stackSize is as always a compromise. Too small a size exhausts the
stack storage after a few allocations, after which there are no gains over the
backup allocator. Too large a size increases the stack consumed by the thread
and may end up worse off because it explores cold portions of the stack.

Creates a scalable AllocatorList of Regions, each having at least
bytesPerRegion bytes. Allocation is very fast. This allocator does not offer
deallocate but does free all regions in its destructor. It is recommended for
short-lived batch applications that count on never running out of memory.